Can another Mississippi Lease Encroach on my Property

Not exactly along your line sir, but after we had leased our land in ND and started receiving royalty checks I started mucking around on the ND maps. I found “our” well but it wasn’t on our land, instead it was a mile or so to the NW. I checked and found that yes, the well was indeed not on our land but was drilled horizontally under our land so that the revenue went to us. To this simple-minded person that’s honorable, ethical and honest business.